package com.admin.quartz.util;

import com.admin.common.constant.ScheduleConstants;
import com.admin.common.exception.job.TaskException;
import com.admin.common.exception.job.TaskException.Code;
import com.admin.quartz.domain.SysJob;
import org.quartz.*;

/**
 * 定时任务工具类
 *
 * @author fangchen
 */
public class ScheduleUtils {
    /**
     * 得到quartz任务类
     *
     * @param sysJob 执行计划
     * @return 具体执行任务类
     */
    private static Class<? extends Job> getQuartzJobClass(SysJob sysJob) {
        boolean isConcurrent = "0".equals( sysJob.getConcurrent() );
        return isConcurrent ? QuartzJobExecution.class : QuartzDisallowConcurrentExecution.class;
    }

    /**
     * 构建任务触发对象
     */
    public static TriggerKey getTriggerKey(Long jobId, String jobGroup) {
        return TriggerKey.triggerKey( ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup );
    }

    /**
     * 构建任务键对象
     */
    public static JobKey getJobKey(Long jobId, String jobGroup) {
        return JobKey.jobKey( ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup );
    }

    /**
     * 创建定时任务
     */
    public static void createScheduleJob(Scheduler scheduler, SysJob job) throws SchedulerException, TaskException {
        Class<? extends Job> jobClass = getQuartzJobClass( job );
        // 构建job信息
        Long jobId = job.getJobId();
        String jobGroup = job.getJobGroup();
        JobDetail jobDetail = JobBuilder.newJob( jobClass ).withIdentity( getJobKey( jobId, jobGroup ) ).build();

        // 表达式调度构建器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule( job.getCronExpression() );
        cronScheduleBuilder = handleCronScheduleMisfirePolicy( job, cronScheduleBuilder );

        // 按新的cronExpression表达式构建一个新的trigger
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity( getTriggerKey( jobId, jobGroup ) )
                .withSchedule( cronScheduleBuilder ).build();

        // 放入参数，运行时的方法可以获取
        jobDetail.getJobDataMap().put( ScheduleConstants.TASK_PROPERTIES, job );

        // 判断是否存在
        if (scheduler.checkExists( getJobKey( jobId, jobGroup ) )) {
            // 防止创建时存在数据问题 先移除，然后在执行创建操作
            scheduler.deleteJob( getJobKey( jobId, jobGroup ) );
        }

        scheduler.scheduleJob( jobDetail, trigger );

        // 暂停任务
        if (job.getStatus().equals( ScheduleConstants.Status.PAUSE.getValue() )) {
            scheduler.pauseJob( ScheduleUtils.getJobKey( jobId, jobGroup ) );
        }
    }

    /**
     * 设置定时任务策略
     */
    public static CronScheduleBuilder handleCronScheduleMisfirePolicy(SysJob job, CronScheduleBuilder cb)
            throws TaskException {
        switch (job.getMisfirePolicy()) {
            case ScheduleConstants.MISFIRE_DEFAULT:
                return cb;
            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES:
                return cb.withMisfireHandlingInstructionIgnoreMisfires();
            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED:
                return cb.withMisfireHandlingInstructionFireAndProceed();
            case ScheduleConstants.MISFIRE_DO_NOTHING:
                return cb.withMisfireHandlingInstructionDoNothing();
            default:
                throw new TaskException( "The task misfire policy '" + job.getMisfirePolicy()
                        + "' cannot be used in cron schedule tasks", Code.CONFIG_ERROR );
        }
    }
}